Self raking attachment for harvesters



(No Model.) 2 Sheets-Sheet 1.

M. DEW; SELF BAKING ATTACHMENT FOR. HARYESTERS. r I No. 373,055.Patented Nov. 15; 1887.

N. PETERS, Pholvkilhngrapher, Wnhmgton. D. c.

(No Model.) 2 Sheets-Sheet 2.

M. DEW.

SELF BAKING ATTAGHMENTFOR HARVEQTERS. vN0. 373,055.

Patented Nov. 15, 188'].

Inven hr. Marlin .Dem I 5%;

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N. Pzmzs Photolilhoglwhur. Washinglnn. uc.

UNITED STATES ATENT rricn.

MARTIN DEW, OF CASS CITY, MICHIGAN.

SELF-RAKING ATTACHMENT FOR HARVESTERS.

SPECIFICATION forming part of Letters Patent No. 373,055, dated November15, 1887.

Application filed August .10, 1886. Serial No. 211,422. (No inodel.)

To all whom it may concern:

Be it known that I, MARTIN DEW, of Cass O1ty, 1n, the county of Tuscolaand State of Michigan, have invented new and useful Improvements. inSelf-Raking Attachments for Harvesters; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, which form a part of thisspecification.

This invention relates to new and useful improvements in self'rakingattachments for reapers and harvesters, by means of which the cut grainis conveyed from the platform to a receptacle where it is to be bound.

The object of my invention is to so gather the grain from the platformand deliver it into a receptacle at the inner end of the platform as tomake a complete separation of the cut straw from that falling on theplatform.

My invention consists in the novel construction, arrangement, andcombination of differout parts of my self-raking device, all ashereinafter described, and specifically set forth in the claims.

In the drawings which accompany this specification, Figure 1 is a planview of my improved self-raking device as attached to the platform of aharvester. Fig. 2 is a crosssection thereof on line x as. Fig. 3 is alongi. tudinal vertical section. Fig. 4 is an elevation of theguide-rail of the rake-heads. Fig. 5 is a perspective view of the innerend of the harvester-platform and its attachments. Fig. 6 is a detachedelevation of the rake-head. Figs. 7, 8, and 9 are elevations of detachedparts, indicated by their letters of reference, and also specificallyreferred to hereinafter.

' A is the platform of a harvester, supportedon a suitable frame in anysuitable manner,

. and provided with the usual cutting apparatus. (Not shown in thedrawings.) 7

At each end of the platform is located a shaft, B, and on these shaftsare secured suitable sprocket-wheels, around which are stretched theendless chains 0 O, as in the usual construction of chain-carriers.

Two rakes, D, are used, of the kind shown in Fig. 6. These are securedto the chains 0, at equal distances apart, by means of links E, ofwhich'Fig. 9-is a side elevation. These links are provided withjournal-bearings a, in which the rake-heads are journalcd by means ofcylindrical bearings 1), formed thereon. The bearings b are providedwith cam-grooves 0, into which a pin, (1, secured in the respectivejournal-bearings, engages.

Each rake-head is provided with a crank, c,

observed thattheguide-railF runsparallel with the direction of thechains, except neartheinner and outer ends of the platform, where itdiverges therefrom, and the guide-rail G runs parallel to that portionof the guide-rail F to which it corresponds. By this arrangement acertain lateral movement is imparted to the rake-head near the inner andouter ends of the platform while it travels around the sprocketwheels,all in the manner and for the purpose hereinafter described.

The inner end of the platform connects with the binding-table, which isprovided witha suitablebinding apparatus, which is not shown, as it doesnot form a necessary part of the present'invention. The apparatus forreeling the grain onto the platform isalso omitted, as I intend to useany-of the ordinary constructions-snch as the common reel or areel-rake, preferably the latter, in which case four beaterarms withteeth carried by the wheel f would be arranged to operate in the usualmanner.

. The openings 9 at the outer and inner ends of the platform; throughwhich the rakes pass up and down, are protected by suitable guards toprevent the straw from falling through, the opening at the outer endsbeing protected by guards h of any suitable constructionin the presentinstance shown as spring-metal fingers rigidly secured to thedivider-boardand at the inner end by guards i, which are secured to arock-shaft,j, to which is secured the rockarm K. The free end of thisrockarm is'suitably bent to pass through a slot in the guide-rail F andproject into the path of the rakes, all so arranged that in the movementof said rakes the cranks at the ends thereof will strike against thefree end of the rock-arm and lift it up, so as to raise the guards tsufficiently high above the platform to permit the rake-heads passingunderneath.

Above the inner end of the platform are secured a number of springs, I,arranged so that the cut straw in passing underneath said springs iscompressed until it has passed beyond, when the springs will be releasedfrom their compression and drop to their former position. Each of thesesprings I is preferably of the shape shown in Figs. 3 and 5, with oneend fixedly secured to the cross-bar I and its other or vertical portionworking loosely through holes in the bracket 1 secured to said bar.

I preferably keep the chains entirely concealed below the platform, andprovide the latter with suitable slots, 1, through which the links Eproject to carry the rakes over the top of the platform.

One or more of the raketeeth have a rear extension, 7r, said extensionbeing designed to come in contact at a certain point of the operation ofthe rake with a stationary stop or stops, m, below the platform,near theinner end thereof.

The parts being arranged and constructed as shown and described,theiroperation is as follows: Vhile the rake passes over the surface of theplatform its teeth are held vertically up, owing to the engagement ofthe crank at the rear end of the rake-head into asuitable groove in theguide'rail F. In this position of the rake the pin (Z on thejournal-bearing of the rake engages into an offset in the cam-groove cof the rake-bearing, as shown in Fig. 7, thereby holding the partsfirmly locked together. The semicircular portion of the guiderail F isalso suitably grooved to guide the rear end of the rake-head, and as'the latter arrives at the inner end of the platform it also comes incontact with the guide-rail G, and as the rake passes down between thesetwo guiderails it is laterally displaced toward the rear, owing to theangularity of the guide-rails with the chains. This lateral displacementof the rake-headis equal to the lateral length of the cam-groove c inthe bcarin g b, and it causes the pin (1 to traverse said cam-groove cafter releasing it from its engagements in the offset therein. The teeth.of the rake are thus held in a perpendicular position until the rakehas reached the lowest point-that is, having passed around the outerhalf of the sprocketwheels. Here the pin d will be at the point in thecam-groove shown in Fig. 8, having traversedone-half of the cam-groove;and now, in the further travel of the rake, the projections k on therake-teeth (there being preferably two or more teeth with suchprojections) strike the stops at and thereby impart to the rake-headone-quarter of a revolution, the raketeeth thereby assuming a horizontalposition, which they will maintain until they arrive near the outer endof the platform. In raising upward at this end of the platform, the rearend of the rake-head is again engaged in a groove in the guide rail Fand pushed laterally forward by a suitable forwardinclination of theguide-rail to cause the pin (1 to traverse the remaining onequarter ofthe cam-groove, so that by the time the rake reaches the top of theplatform the pin d will be in its starting position. Fig. 4 shows indotted lines the differentpositions of the rake'teeth. It will be seenthat the rakes are thus made operative the whole length of the platform,and as they draw below the platform at the inner end they keep thebundle still compressed; and if the beater or reelarms are timed withthe rakes to throw their complement of grain on the platform when one ofthe rakes rises to the surface and at the proper intervals of time topermit each rake to sweep the platform the whole width before any moregrain is thrown on the platform, a complete separation of the cut straw.is obtained and the bundles are ready to be tied.

It will be further observed that as the raketeeth are turnedhorizontally below the platform the latter can be reduced in height.

I preferably provide the platform with a slight upward incline at theinner end,for the purpose of withdrawing the rake-teeth more graduallyand also to get enough room for the operation of the binding mechanism,which, in connection with the parts herein shown and described,constitutes what is commonly termed a low-down binder.

\Vhat I claim as my invention is 1. The combination, with the rake-headsand the chains, of a link provided with journal-bearings a, a pin, (1,in saidjournal-bearings, and cylindrical bearing b, formed on saidrake-head and provided with cam-grooves c, engaging said pin,substantially as and for the purposes specified.

2. In a self-raking device for reapers and harvesters, the combination,with endless carrier chains, of a rake-head rotatablyjournaled inbearings secured to the carrier-chains and having rigid raketeeth, a pinon the bearing and cam-groove in the journal of said rake-head, and acam, G, fixed on the frame at its inner end, for effecting the lateralmovement of the rake-head by direct action thereon required to rotatethe rake-head by reason of said pin and cam-groove engagement at certainparts of its travel, all substantially as described.

3. In a self-raking device for reapers and harvesters, the combination,with the rake D, having the crank 0 formed at its rear end, of thecarrier-chains G, the links E, having journal-bearings a, the bearing bon the rake head, having cam-groove c, the pin d, engaging into saidcam-groove, the guide-rails F, and cam G, fixed on the frame at itsinner end, all arranged and operating substantially as described.

4. In a self-raking device for reapcrs and harvesters, in combinationwith the endless chain'carrier and means for imparting motionthereto,arake rotatably secured to said chaincarrier, the link E,provided with journalbearings, a pin in said bearings, a camgroove inthe rake-head engaging said pin, and the cam G, whereby the rake-head isactuated independently of the carrier-chains to hold the teeth in avertical position while passing over the platform and around the innerend thereof, substantially as described.

5. In a self-raking device for reapers and harvesters, in combinationwith endless chaincarrier and means forimparting motion thereto, a rakeprovided with cylindrical bearings rotatably secured to saidchain-carrier, the link E, provided with journal-bearings, a pin in saidbearings, a camgroove in the rakehead engaging said pin, and cam-guidesfor the ends of the rake for actuating the rakehead independently of thecarrier-chains, to hold the teeth of the rake in a vertical positionwhile passing around the inner and outer end of the platform and overthe top of the same and in horizontal position while passing below thesame, substantially as described. 6. The combination, with the rake andguide-rails, of the rock-shaft j, guards i thereon, and the rock-arm Kon said rockshaft and projecting in the path of said rake, substantiallyas and for the purpose specified. 7. The combination, with the platform,of the rake, rear extension, 70, on the teeth of said rake, and stops mbelow the p1atf0rrn,near the inner end thereof, substantially as shownand described, and for the purpose specified.

MARTIN DEW.

' Witnesses:

L. A. DE WITT, S. O. ARMSTRONG.

